Inspection Procedure

HINT:

Using the intelligent tester's DATA LIST allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the DATA LIST early in troubleshooting is one way to save time.

NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

Warm up the engine.
Turn the ignition switch OFF.
Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
Turn the ignition switch ON.
Turn the intelligent tester ON.
Enter the following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST.

Follow the instructions on the tester and read the DATA LIST.

ECM:

ITEM MEASUREMENT NORMAL CONDITION CHART

Item	Measurement Item/ Range (Display)	Normal Condition	Diagnostic Note
STOP LIGHT SW	Stop light switch status/ ON or OFF	Brake pedal is depressed: ON Brake pedal is released: OFF	-

INSPECT STOP LIGHT SWITCH

Remove the S10 stop light switch.

Measure the resistance of the switch.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Switch Condition	Specified Condition
1 - 2	Pin pushed (pedal released)	10 kΩ or higher
1 - 2	Pin not pushed (pedal depressed)	Below 1 Ω
3 - 4	Pin pushed (pedal released)	10 kΩ or higher
3 - 4	Pin not pushed (pedal depressed)	Below 1 Ω

Fig 1: Inspecting Stop Light Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE STOP LIGHT SWITCH

OK: Go to Next Step

CHECK WIRE HARNESS (ECM - BATTERY)

Measure the voltage of the wire harness side connector.

Fig 2: Identifying E5 Wire Harness Connector Terminals

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
E5-4 (STP) - Body ground	Brake pedal is depressed	10 to 14 V
E5-4 (STP) - Body ground	Brake pedal is released	Below 1 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE ECM